Starting Position: Sit on the ground with your upper back against a bench, with knees bent with your arms at your sides.
Procedure: Lift hips to create a line through knees, hips & shoulders. Lower the hips and torso back to the starting position. Keep the back flat and the torso engaged throughout the movement. Repeat for the prescribed repetitions.
Coaching Key: Drive through the heels. Emphasize the squeeze of the glutes and abdominals at the top of the bridge. Prevent arching the lower back.
Feel it: Working the glutes, abdominals, and, to a lesser extent, the hamstrings.